Common error codes in Baxi combi boilers provide users with valuable insights for understanding their devices. These codes offer crucial information to swiftly and effectively troubleshoot issues.
Power HT Plus Baxi Boiler Codes
The E symbol continues to be displayed on the control panel. If the display of the error code persists, contact the accredited assistance service.
| Error Codes | Solutions |
|---|---|
| E10 | Outside sensor. Outside temperature sensor. |
| E20 | Boiler sensor 1. Flow back sensor. |
| E28 | Flue gas temp sensor. Flue gas sensor. |
| E40 | Return sensor 1. Return temperature sensor. |
| E46 | Return sensor cascade. Cascade return temperature sensor error. |
| E50 | HW sensor 1. Domestic hot water sensor (only for heating only models with domestic hot water tank). |
| E52 | HW sensor 2. Solar domestic hot water sensor (if incorporating a solar system). |
| E60 | Room sensor 1. Room temperature sensor 1 error. |
| E65 | Room sensor 2. Room temperature sensor 2 error. |
| E68 | Room sensor 3. Room temperature sensor 3 error. |
| E78 | Water pressure sensor. Hydraulic pressure sensor error. |
| E73 | Collector sensor 1. Solar collector sensor (if incorporating a solar system). |
| E83 | BSB short-circuit. Communication problem between boiler PCB and control unit. Probable short circuit on the heating. |
| E84 | BSB address collision. Address conflict between several control units (internal anomaly). |
| E91 | Data loss in EEPROM. Loss of data in EEPROM. |
| E98 | Extension module 1. Extension module 1 error. |
| E99 | Extension module 2. Extension module 2 error. |
| E100 | 2 clock time masters. 2 master clocks. |
| E102 | Clock without backup. Master clock with no power reserve. |
| E103 | Communication failure. Communication error. |
| E109 | Boiler temp supervision. Air present in the boiler circuit (anomaly). |
| E110 | Lockout SLT. Safety thermostat cut-off for overheating (pump blocked or air in the heating circuit). |
| E111 | Shutdown limit thermost. Safety thermostat cut-off for overheating. |
| E117 | Water pressure too high. Pressure in hydraulic circuit too high. |
| E118 | Water pressure too low. Pressure in hydraulic circuit too low. |
| E125 | Boiler temp too high. Safety cut-off for absence of circulation (check made by a sensor). |
| E128 | Loss of flame in op. Flame extinguished. |
| E130 | Flue gas temp too high. Cut-off by flue gas sensor for overheating. |
| E133 | Safety time exceeded. Ignition error (4 attempts). |
| E151 | BMU internal. Internal error on heating PCB. |
| E152 | Parameterization. General parameter setting error. |
| E153 | Unit locked. Appliance locked manually. |
| E160 | Fan speed threshold. Fan operation error. |
| E162 | Air pressure switch. Flue gas pressure switch tripped. |
| E171 | Alarm contact 1 active. ACI board error. |
| E178 | Limit thermostat CH1. Safety thermostat CH1. |
| E179 | Limit thermostat CH2. Safety thermostat CH2. |
| E321 | HW outlet sensor. Domestic hot water sensor damaged. |
| E343 | Solar integration missing General parameter setting error on the solar system (if incorporating a solar system). |
| E353 | Casc sens B10 missing. B10 cascade sensor missing. |
| E372 | Limit thermostat CH3. Safety thermostat CH3. |
| E373 | Extension module 3. Extension module 3. |
| E384 | Extraneous ligth. Light incorrect (parasite flame - internal anomaly). |
| E385 | Mains undervoltage. Power supply voltage too low. |
| E386 | Fan speed tolerance. Fan threshold speed not reached. |
| E430 | Dyn water pres too low. Safety cut-off for absence of circulation (check made by a pressure sensor). |
| E432 | Function ground missing. Earthing function not connected. |
| E110 | Lockout SLT The code E110 is displayed when overheating occurs due to a breach in the insulation: Remove the heat exchanger. Replace the insulation behind the burner bracket. Replace the safety thermofuse behind the heat exchanger. |
Baxi Luna Duo-Tec Codes
- 09: Gas valve connection fault.
- 10: Outdoor sensor fault.
- 15: Gas valve command fault.
- 20: Central Heating NTC sensor fault.
- 28: Flue NTC heat exchanger sensor faul.
- 40: Return NTC sensor fault.
- 50: Domestic Hot Water NTC sensor faul.
- 53: Obstruction in the flue pipe.
- 55: PCB not programmed.
- 83, 84, 85, 86, 87: Communication problem between boiler board and control unit.
- 109: Pre-circulation alarm (temporary fault).
- 110: Safety thermostat tripped due to over temper.
- 118: Hydraulic pressure too low.
- 125: No circulation of the water.
- 128: Loss of flame.
- 130: NTC flue sensor tripped due to over temperature.
- 131: Thermo fuse tripped due to over temperature.
- 133: Ignition failure.
- 134: Gas supply valve blocked.
- 135: Internal error.
- 160: Fan fault.
- 162, 317: Incorrect power supply frequency.
- 169: Flue pressure switch (contact open)
- 164, 384: Fault flame (parasitic flame).
- 165, 385: Input voltage too low.
Automatic Error Code Clearing
If the symbol ‘setting’ is displayed at the same time as the error code, the error code is automatically cleared when the cause that prompted it stops. A flow or return temperature in excess of the critical value prompts an error code. The error code is automatically cleared when the temperature drops below the critical value.
How To Clear Error Code On Baxi Boiler?
If the probable cause of an error code is resolved but the error code continues to be displayed, proceed as follows to clear the error code:
- Press the ‘selection and confirmation button’ button. The command Reset? Yes is displayed on the control panel.
- Confirm by pressing the ‘selection and confirmation button’ button. The error code disappears after a few seconds.
Symbol Meanings
Baxi Boiler Flashing Meanings
A lock-out condition can be re-set up to 5 times within one hour using the reset button. Any repeating fault should be fully investigated and appropriate remedial actions taken by your installer or Baxi Customer Support.
| Green Light Flashing | Red Light Flashing |
|---|---|
| Temperature Protection | Sensor Error |
| Shutdown Input | High Temperature Protection |
| Flame Loss | Ignition Fault |
| Communication Fault | Fan Fault |
| Parameter Fault | Parameter Fault |
| Miscellaneous | Miscellaneous |
Troubleshooting
| Trouble | Solution |
|---|---|
| There is no domestic hot water. | The boiler is not switched on. Check that the boiler is switched on. Check the fuses and switches. Check that the gas valve is fully opened. |
| The DHW mode is deactivated. Activate the DHW mode using a suitable controller. | |
| The water pressure is too low (< 0.8 bar). Top up the installation with water. | |
| The energy-saving shower head is restricting the water flow. Clean the shower head; replace if necessary. | |
| The DHW temperature setting is too low. Increase the temperature setting by using the rotary knob on the control panel or by using a suitable controller. | |
| The radiators are cold. | The heating temperature setting is too low. Increase the value of parameter p1 using a suitable controller or, if a room thermostat is connected increase the temperature. |
| The heating mode is deactivated. Activate the heating mode using a suitable controller. | |
| The radiator valves are closed. Open the valves on all radiators connected to the heating system. | |
| The boiler is not switched on. Check that the boiler is switched on. Check the fuses and switches. Check that the gas valve is fully opened. | |
| The water pressure is too low (< 0.8 bar). Top up the installation with water. | |
| The heating water temperature setting is too low. Increase the temperature setting by using the rotary knob on the control panel or by using a suitable controller. | |
| The boiler is not working. | The heating temperature setting is too low. Increase the value of parameter p1 using a suitable controller or, if a room thermostat is connected increase the temperature. |
| No power supply. Check that the boiler is switched on. Check the fuses and switches. | |
| The water pressure is too low (< 0.8 bar). Top up the installation with water. | |
| An error code appears on the display. Press the Reset button for 2 seconds. Correct the error if possible. | |
| The gas pressure is too low. Check that the gas valve is fully opened. Open the gas valve. | |
| The water pressure is too low (< 0.8 bar). | Not enough water in the installation. Top up the installation with water. |
| Water leak. Contact the fitter. | |
| Significant variations in domestic hot water temperature. | Insufficient water supply. Open the valve. |
| Clicking in the central heating pipes. | The central heating pipe connections are too tight. Contact the fitter. |
| There is air in the heating pipes. It is essential that you bleed any air in the calorifier, the conduits or the taps to prevent the annoying noises likely to be produced during heating or when tapping water. | |
| The water is circulating too quickly in the central heating system. Contact the fitter. | |
| Significant water leak under or close to the boiler. | The boiler or central heating pipes are damaged. Close the water supply. Contact the fitter. |
Manual Pdf
MainEco Combi Boiler User Manual
Consumer HVAC Editor at FindErrorCode.com
FindErrorCode.com is a reputable error code provider firm. Do not forget to write to us the fault codes that you cannot find. Contact: peterfuchs@finderrorcode.com Call: 916-954-2677
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